Ease is the difference between your body measurements and the finished measurements of a garment. Wearing ease is the minimum room you need to breathe, move and sit, about 5–6 cm (2–2 3/8 in) at the bust of a fitted woven top; design ease is the extra room that creates the style, from a few centimeters in a sheath dress to 25 cm (10 in) or more in an oversized top. Knit garments can have negative ease: they are smaller than the body and stretch to fit.
Every pattern includes ease, which is why pattern pieces measure more than your body. Understanding it helps you choose a size, read finished measurements and predict how a garment will feel.
How to calculate ease
Ease = finished garment measurement − body measurement.
With a bust of 92 cm (36 1/4 in) and a top whose finished bust is 102 cm (40 1/4 in), the ease is 10 cm (4 in), spread around the whole body: about 2.5 cm (1 in) in each quarter of the garment. The same calculation works at the waist, the hip, the upper arm and the thigh.
Wearing ease: room to move
Wearing ease exists because the body changes shape as it moves. The chest expands when you breathe, the hips and thighs spread when you sit, and the back widens when you reach forward. A garment that matches your measurements exactly feels tight the moment you move.
Typical minimums in woven fabric:
- Bust: 5–6 cm (2–2 3/8 in)
- Waist: 2.5–4 cm (1–1 5/8 in)
- Hip: 4–5 cm (1 1/2–2 in), more for trousers, which need room to sit
- Upper arm: about 5 cm (2 in)
Design ease: the style
Design ease is added on top of wearing ease to create a silhouette: the soft blouse, the boxy cropped top, the dropped shoulders of an oversized sweatshirt. Two patterns for the same body can differ by 20 cm (8 in) at the bust and both be right, because they are different designs.
Fullness, as in a gathered or circle skirt, is a related idea: the skirt fits the waist with a little ease, and the extra width lives below it.
Where ease matters most
Some areas forgive a lack of ease and others do not. A skirt waist that is a little snug is fine with elastic; a bust or upper arm with too little ease in a woven top pulls across the front and binds when you drive or reach forward. In trousers, the seat and thighs need the most room, because they spread when you sit. When in doubt, keep the ease at the bust, upper arm, hip and thigh, and take in the waist if you want a closer fit.
Negative ease: smaller than the body
Knit fabrics stretch, so a fitted T-shirt or leggings can be cut smaller than the body. That is negative ease. The amount must stay within what the fabric can stretch comfortably, so check its stretch percentage before you cut. Never use a pattern with negative ease in a woven fabric: it will not go on.
Ease by garment type
| Garment | Typical ease (woven unless stated) |
|---|---|
| Fitted bodice or sheath dress | Bust 5–8 cm (2–3 in) |
| Classic blouse or shirt | Bust 10–12 cm (4–4 3/4 in) |
| Boxy top | Bust 15–25 cm (6–10 in) |
| Oversized top or sweatshirt | Bust 25 cm (10 in) or more |
| Pencil skirt | Hip 4–5 cm (1 1/2–2 in) |
| A-line skirt | Hip 6–10 cm (2 3/8–4 in) |
| Straight trousers | Hip 8–12 cm (3 1/8–4 3/4 in) |
| Fitted jersey T-shirt | Bust −5 to +5 cm (−2 to +2 in) |
These are typical ranges, and individual designs vary. The post how much ease? A chart by garment type goes into more detail.
The ease Sewly adds
Sewly's patterns have a fit option with four settings: fitted, regular, relaxed and oversized. Each adds a set amount of ease to your body measurements, different for woven and knit fabric:
| Woven | Fitted | Regular | Relaxed | Oversized |
|---|---|---|---|---|
| Bust | 6 cm (2 3/8 in) | 10 cm (4 in) | 16 cm (6 1/4 in) | 28 cm (11 in) |
| Waist | 4 cm (1 5/8 in) | 9 cm (3 1/2 in) | 18 cm (7 1/8 in) | 30 cm (11 3/4 in) |
| Hip | 5 cm (2 in) | 8 cm (3 1/8 in) | 12 cm (4 3/4 in) | 22 cm (8 5/8 in) |
| Upper arm | 5 cm (2 in) | 7 cm (2 3/4 in) | 10 cm (4 in) | 14 cm (5 1/2 in) |
| Knit | Fitted | Regular | Relaxed | Oversized |
|---|---|---|---|---|
| Bust | −2 cm (−3/4 in) | 5 cm (2 in) | 12 cm (4 3/4 in) | 24 cm (9 1/2 in) |
| Waist | 0 | 6 cm (2 3/8 in) | 14 cm (5 1/2 in) | 26 cm (10 1/4 in) |
| Hip | 0 | 5 cm (2 in) | 10 cm (4 in) | 20 cm (7 7/8 in) |
| Upper arm | 1 cm (3/8 in) | 4 cm (1 5/8 in) | 8 cm (3 1/8 in) | 12 cm (4 3/4 in) |
Trousers get an extra 4 cm (1 5/8 in) at the hip so you can sit, and woven set-in sleeves get a little cap ease, a sleeve cap slightly longer than the armhole, so they round smoothly over the shoulder. Change the fit setting and the 3D preview shows the difference at once.
How to find the ease you like
The most reliable guide is a garment you already love wearing.
- Lay it flat and measure straight across the bust, 2.5 cm (1 in) below the armholes. Double the number.
- Do the same at the waist and at the hip.
- Subtract your body measurements. The results are the ease you find comfortable for that kind of garment.
- Compare them with the pattern's finished measurements, or choose the fit setting closest to them.
Common mistakes with ease
- Sizing down because the pattern looks big. The extra width is usually designed ease. Compare finished measurements with a garment you like before changing size.
- Removing ease from a fitted woven garment. It fits standing still and pulls as soon as you sit or reach.
- Cutting a knit pattern in a woven fabric. With no stretch, a pattern drafted with zero or negative ease will not go on.
- Confusing the two charts. Choose your size from the body measurement chart, then judge the fit from the finished measurements; how to choose your size walks through it.
- Forgetting what goes underneath. A jacket worn over a sweater needs more ease than one worn over a T-shirt.